Irkutsk Governorate (Russian: Иркутская губерния, romanized: Irkutskaya guberniya) was an administrative-territorial unit (guberniya) of the Russian Empire, located in Siberia. It existed from 1764 to 1926; its seat was in the city of Irkutsk.
¹ Italics indicates renamed or abolished governorates, oblasts, etc on 1 January 1914. ² An asterisk (+) indicates governorates formed or created with renaming after 1 January 1914. ³ Ostsee or Baltic general-governorship was abolished in 1876.